The Neverborn are the Primordials that were slain at the end of the Primordial War. When they died, an Abyss opened and caused their many souls to fall into it. The Abyss gave birth to the Underworld, where the beings now known as the Neverborn now reside. There are five currently known Neverborn: He Who Holds in Thrall, the Abhorrence of Life, the Perfected Principle of Consumption, and the Queen of Suicides. There may be more, but nobody knows for sure.